74137582 divided by 21 
We're looking to find how many times 21 goes into 74137582.

Advancing to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 21

Going ahead to step 2:
21 can be fit into 74 3 times, resulting in a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 63 away from 74, we end up with 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 21

Moving on to step 3:
21 goes into 111 5 times with a remainder of 6.
The next digit of our result is 5. 
Result so far: 35.0
If we subtract 105 from 111, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 21

On to step 4:
63 divided by 21 is 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 353.0
Deduct 63 from 63 and we're left with 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 21

Going ahead to step 5:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 3530.0
If we subtract 0 from 7, we get 7.
Include the next digit (5) from the dividend after 7, then repeat: 75 / 21

Advancing to step 6:
When dividing 75 by 21, we get 3 with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 35303.0
The remainder is 12 after subtracting 63 from 75.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 21

Step 7:
128 divided by 21 is 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 353036.0
Deduct 126 from 128 and we're left with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 21

Advancing to step 8:
If we divide 22 by 21, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 3530361.0
Subtracting 21 from 22 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 9:
If we divide 10 by 21, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 3530361.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 3530361.04
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 3530361.047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 12:
21 goes into 130 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 3530361.0476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 3530361.04761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 14:
190 divided by 21 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 3530361.047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 15:
10 divided by 21 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 3530361.047619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 16:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 3530361.04761904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 3530361.04761904 with a remainder of 1.6e-08.